JP2002213313A - Intake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake device that relieves propagation of impact force from ahead of the travel direction of a vehicle to an engine. SOLUTION: An air connector member 10 is curved, so that when impact force in a collision propagates force from ahead of a travel direction, turning force is generated about a post member 40. The turning force concentrates stress near a bend portion 13 of the air connector member 10 to break the air connector member 10, which can in turn relieve backward propagation of the impact force beyond the air connector member 10 and prevent propagation of the impact force by the collision to a delivery part 50 located backward of the air connector part 10. Damage to the delivery part 50 can be prevented, and fuel leakage from the delivery part 50 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine (hereinafter referred to as "internal combustion engine").
An internal combustion engine is called an “engine”. The present invention relates to an intake device for supplying intake air to an intake device.

[0002]

2. Description of the Related Art Conventionally, in the case of a vehicle such as an automobile, in the event of a collision accident, an engine room arranged forward or rearward in the traveling direction of a vehicle compartment is crushed to reduce the impact force. It generally has a structure capable of absorbing energy. Since it is necessary to supply fuel to the engine, a delivery pipe for supplying fuel to the injector is provided in the intake manifold for supplying intake air, for example. Therefore, in order to prevent fuel leakage due to the impact force at the time of collision, it is necessary to prevent the impact force from propagating to the delivery pipe side. For example, as in the intake manifold disclosed in Japanese Utility Model Laid-Open Publication No. 63-24359, a fragile portion is provided in a part of the intake manifold in the circumferential direction, and the fragile portion is destroyed by the impact force at the time of a collision to reduce the impact force. I am trying to absorb it. Further, the intake manifold disclosed in Japanese Patent No. 2699915 discloses a structure in which a weak portion is provided in an axial direction to absorb an impact force.

[0003]

However, the above-mentioned Japanese Utility Model Application Laid-Open No. 63-24359 and Japanese Patent No. 26999 are described.
The intake manifold disclosed in Japanese Patent Publication No. 15 is
In each case, the impact force is absorbed when the engine is installed at right angles to the traveling direction of the vehicle, that is, when the engine is installed sideways. Therefore, no consideration is given to the case where the engine is installed parallel to the traveling direction, that is, installed vertically.

[0004] When the engine is installed sideways as described above, the intake manifold is installed on the front side of the engine in the vehicle traveling direction, so that it is possible to absorb the impact force due to the destruction of the intake manifold itself. On the other hand, when the engine is installed vertically, the intake manifold is installed either to the left or to the right with respect to the vehicle traveling direction of the engine. Therefore, even if the intake manifold itself is broken, it is difficult to reduce the propagation of the impact force from the front of the vehicle body.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air intake device that reduces the transmission of an impact force from the front of the vehicle in the traveling direction to the engine.

[0006]

According to the intake device of the first aspect of the present invention, an intake passage member having a curved portion is disposed forward of the engine in the vehicle traveling direction. When a force is applied to the intake passage member from the front side in the vehicle traveling direction of the intake passage member, the intake passage member is bent rearward in the traveling direction, and the curved portion of the intake passage member contacts the support member. Therefore, when a force is further applied to the curved portion in contact with the support member from the front side in the vehicle traveling direction, the movement is restricted by the support member. As a result, the force concentrates on the contact portion between the curved portion and the support member, and the intake passage member is broken. Therefore, the impact force acting from the front side in the vehicle traveling direction is absorbed by the destruction of the intake passage member, and the propagation of the impact force backward from the intake passage member can be reduced. For example, even when a delivery unit or the like that supplies fuel is installed behind the intake passage member, it is possible to prevent damage to the delivery unit due to propagation of the impact force.

According to the intake device of the second or third aspect of the present invention, the support member is fixed to a member different from the intake passage member. Therefore, the support member serves as a fulcrum of the intake passage member, and the destruction of the intake passage member is promoted. Therefore, propagation of the impact force from the intake passage member to the rear in the vehicle traveling direction can be prevented.

According to the intake device of the fourth aspect of the present invention, the vicinity of the curved portion of the intake passage member is formed so as to be thinner than other portions. Therefore, the intake passage member is easily broken from the contact portion with the support member. Therefore, propagation of the impact force from the intake passage member to the rear in the vehicle traveling direction can be prevented.

According to the intake device of the fifth aspect of the present invention, the intake passage member comprises a curved portion and a straight pipe portion, and the curved portion and the straight pipe portion are joined near the contact portion with the support member. I have. Therefore, the joining portion has lower strength than other portions and is easily broken by an impact force. Therefore, propagation of the impact force from the intake passage member to the rear in the vehicle traveling direction can be prevented.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; (First Embodiment) An intake device according to a first embodiment of the present invention
It is mounted above the engine head cover. As shown in FIGS. 1 and 2, the intake device 1 according to the first embodiment includes:
Air connector member 10 as intake passage member, surge tank 20, intake manifold 30, support member 40
And a delivery unit 50.

The air connector member 10 has one end connected to the surge tank 20 and the other end connected to a throttle body (not shown). The air connector member 10 is a cylindrical member formed of resin. The air connector member 10 includes a flange portion 11, a first straight pipe portion 12, a curved portion 13, and a second straight pipe portion 14. The flange portion 11 is connected to an intake pipe provided on a throttle body (not shown). The first straight pipe portion 12 has one end connected to the flange portion 11 and the other end connected to the curved portion 13. The curved portion 13 connects the first straight pipe portion 12 and the second straight pipe portion 14 at a right angle. The curved portion 13 is curved in the horizontal direction. The second straight pipe portion 14 has one end connected to the curved portion 13 and the other end connected to the surge tank 20. As shown in FIG. 3, the wall thickness of the pipe in the vicinity of the bent portion 13, in particular, the connection portion between the bent portion 13 and the second straight pipe portion 14 is smaller than other portions of the air connector member 10. I have.

The surge tank 20 is installed above a cylinder head of the engine. That is, the surge tank 20 is fixed to the engine. Surge tank 20
Distributes intake air supplied from an air cleaner (not shown) via the air connector member 10 to each intake pipe of the connected intake manifold 30. The surge tank 20 is formed of resin.

The intake manifold 30 supplies the intake air distributed by the surge tank 20 to each cylinder of the engine. The intake manifold 30 has a flange portion 31 and a plurality of intake pipe portions 32. Flange part 31
Connects the intake pipes 32 of the intake manifold 30 to the intake pipes connected to the cylinders of the engine (not shown). In the intake manifold 30, a flange portion 31 and a plurality of intake pipe portions 32 are integrally formed of resin.

The support member 40 is installed on the intake manifold 30 formed of resin. The support member 40 is formed of resin or metal. The support member 40 is a rod-shaped member, and is installed on the flange portion 31 of the intake manifold 30 as shown in FIG. The support member 40 extends from the flange portion 31 to a position where the support member 40 can contact the curved portion 13 of the air connector member 10. That is, the end of the support member 40 on the side opposite to the flange portion extends to the upper side in FIG. 2 from the center axis of the air connector member 10. Each intake pipe 32 of the intake manifold 30 has an injector 6 for injecting fuel during intake.
0 is provided.

The delivery section 50 supplies fuel to the injectors 60 provided in each intake pipe section 32 of the intake manifold 30. A delivery section 50, a fuel rail section 51 to which fuel is supplied from a fuel tank (not shown);
A supply unit 52 for distributing fuel from the fuel rail unit 51 to each injector 60;

Next, the behavior when a force is applied to the intake device 1 according to the present embodiment will be described. The force applied to the intake device 1 by the impact at the time of the collision generally acts from the front side to the rear side in the traveling direction of the vehicle, that is, from right to left in FIG. The force due to the impact is transmitted to the air connector member 10 of the intake device 1 from, for example, a frame of the engine room. At this time, the force due to the impact is applied to the air connector member 1.
0 of the first straight pipe portion 12 on the front side in the traveling direction of the vehicle.

On the other hand, the air connector member 10 is connected to a surge tank 20. Since the surge tank 20 is fixed to the engine head cover, movement of the air connector member 10 on the surge tank 20 side is restricted. Therefore, the rearward movement of the air connector member 10 caused by the force acting on the first straight pipe portion 12 of the air connector member 10 is regulated by the surge tank 20. as a result,
The impact force due to the collision is mainly received by the front side of the first straight pipe portion 13.

When a force acts on the air connector member 10, the air connector member 10 is bent rearward, and the bent portion 13 of the air connector member 10 and the support member 40 come into contact with each other. Since the support member 40 is fixed to the intake manifold 30, the support member 40 restricts the movement of the air connector member 10 due to the bending. When an impact force due to a collision is further applied to the front side of the first straight pipe portion 12, a rotational force having a contact point between the air connector member 10 and the support member 40 as a fulcrum acts on the air connector member 10.

The generated stress concentrates on the outer peripheral side of the curved portion 13 when a rotational force acts on a contact point between the air connector member 10 and the column member 40 as a fulcrum. Therefore, FIG.
The air connector member 10 is broken from the vicinity of the curved portion 13 as shown in FIG. Further, as shown in FIG. 3, by reducing the thickness of the pipe near the bent portion 13 of the air connector member 10, the air connector member 10 is easily broken. When the air connector member 10 is broken, a force due to an impact acting from the front side is absorbed. Therefore, the propagation of the impact force to the rear side of the portion where the destruction has occurred is reduced.

As described above, according to the air intake device 1 of the first embodiment, since the air connector member 10 is curved, when an impact force is applied to the air connector member 10 at the time of collision, the air connector member 10 is applied to the air connector member 10. Generates a rotational force about the support member 40. The rotational force causes breakage of the air connector member 10 from the vicinity of the bent portion 13, and the impact force on the rear side of the air connector member 10 is absorbed, and the impact force at the time of collision is reduced. Therefore, the air connector member 1
0, it is possible to prevent the impact force due to the collision from propagating to the delivery unit 50 installed on the rear side of the delivery unit 50.
0 and fuel leakage due to damage to the delivery unit 50 can be prevented.

(Second Embodiment) FIG. 5 shows an intake device 1 according to a second embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the intake device 1 according to the second embodiment, the shape of the air connector member 70 is the first.
Different from the embodiment. The air connector member 70 of the intake device 1 according to the second embodiment has a first member and a second member. In the first member, a flange portion 71, a first straight pipe portion 72, and a curved portion 73 are integrally formed. The second member is composed of the second straight pipe portion 74 and is formed integrally with the surge tank 20. The first member and the second member are joined in the vicinity of the contact portion with the support member 40. The first member and the second member are joined at the joint 75 by, for example, adhesion or welding.

In the second embodiment, by joining the first member and the second member, the joint portion 75 has lower strength than the other portions. Therefore, the air connector member 70 is easily broken from the joint portion 75 by the force acting on the air connector member 70 by the impact force at the time of collision. Therefore,
The impact force due to the collision is absorbed, and the propagation of the impact force due to the collision to the delivery unit 50 installed on the rear side of the air connector member 70 can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing an intake device according to a first embodiment of the present invention.

FIG. 2 is an arrow view of the intake device according to the first embodiment of the present invention as viewed from the direction of arrow II in FIG. 1;

FIG. 3 is a sectional view showing an air connector member of the intake device according to the first embodiment of the present invention.

FIG. 4 is a plan view showing the air intake device according to the first embodiment of the present invention, and is a view for explaining a state of breakage of the air connector member.

FIG. 5 is a plan view showing an intake device according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 intake device 10 air connector member (intake passage member) 13 curved portion 20 surge tank 30 intake manifold 40 support member 70 air connector member (intake passage member) 73 curved portion 74 straight pipe portion 75 joint portion

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiaki Nakayama 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Co., Ltd. (72) Inventor Kuniaki Muramatsu 1-Toyota-cho, Toyota-shi, Aichi Prefecture Toyota Motor Corporation Inside

Claims (5)

[Claims] An intake passage member having a curved portion; a surge tank mounted on an internal combustion engine provided on a rear side of a vehicle with respect to the intake passage member, connected to the intake passage member; An intake manifold capable of supplying intake air to the internal combustion engine from a connection portion between the intake passage member and the surge tank, wherein the intake passage member is provided with a force from the front side of a vehicle. And a support member that can contact the bent portion. 2. The intake device according to claim 1, wherein the support member is provided on the intake manifold. 3. The intake device according to claim 1, wherein the support member is provided on the internal combustion engine. 4. The intake device according to claim 1, wherein a thickness of the vicinity of the curved portion is smaller than other portions. 5. The intake passage member has a straight pipe portion connected to the surge tank, and the bent portion and the straight pipe portion are joined near a contact portion with the support member. 4. The intake device according to claim 1, 2 or 3.